package map;

import java.util.*;

public class MapDemo2 {
    public static void main(String[] args) {
        Map<String,Integer> map = new HashMap<>();
        map.put("语文",98);
        map.put("数学",97);
        map.put("英语",99);
        map.put("化学",95);
        map.put("生物",96);
        System.out.println(map);

        Set<String> keySet = map.keySet();
        for(String key:keySet){
            System.out.println(key);
        }

        Set<Map.Entry<String,Integer>> entrySet = map.entrySet();
        for(Map.Entry<String,Integer> e: entrySet){
            String key = e.getKey();
            Integer value = e.getValue();
            System.out.println(key + ":" + value);
        }

        Collection<Integer> values = map.values();
        for(Integer value :values){
            System.out.println("value:" + value);
        }

        Collection<String> c = new ArrayList<>();
        c.add("one");
        c.add("two");
        c.add("three");
        c.add("four");
        c.add("five");
        for(String e : c){
            System.out.println(e);
        }
        c.forEach(
                e-> System.out.println(e)
        );

        map.forEach(
                (k,v) -> System.out.println(k + ":" + v)
        );
    }
}
